辽西半干旱区不同类型地膜降解特性及其对玉米产量的影响

冯晨,冯良山,刘琪,李昊儒,郑家明,杨宁,白伟,张哲,孙占祥

The Degradation Characteristics of Different Plastic Films and Their Effects on Maize Yield in Semi-Arid Area in Western Liaoning

FENG Chen,FENG LiangShan,LIU Qi,LI HaoRu,ZHENG JiaMing,YANG Ning,BAI Wei,ZHANG Zhe,SUN ZhanXiang

表3 不同类型地膜各时期残片规格及残片数量

Table 3 Size and quantity of residual pieces of different plastic films in each period (pieces/m)

覆膜后天数 Days after mulching (d) T1 T2 T3 4 cm2 4-25 cm2 25-81 cm2 >81 cm2 4 cm2 4-25 cm2 25-81 cm2 >81 cm2 4 cm2 4-25 cm2 25-81 cm2 >81 cm2 14 0 0 0 1 0 0 0 1 0 0 0 1 38 0 0 0 1 0 0 0 1 0 0 0 2 58 0 0 0 1 4 4 2 4 1 7 4 5 98 0 0 0 1 18 9 2 4 9 12 3 5 118 0 1 1 1 23 9 5 5 44 19 12 5